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  • Compact and lightweight - a perfect Dobsonian reflector telescope for traveling or easy trips to the backyard at home
  • 4.5" aperture and 900mm focal length provide clear views of lunar craters and plains on the Moon, planets, bright nebulas and galaxies
  • Sturdy and portable Dobsonian base and handy navigation knob allow for effortless maneuvering of the reflector optical tube
  • Collects a whopping 260% more light than a typical 60mm-aperture beginner telescope - which means hundreds more objects will be visible through the Orion SkyQuest XT4.5 Classic Dobsonian reflector
  • Includes two eyepieces (25mm and 10mm focal length Sirius Plossl), 6x26 correct-image finder scope, 1.25" rack and pinion focuser, collimation cap, eyepiece rack, Starry Night astronomy software, and more!


  • Best for viewing: Brighter deep sky
  • Best for imaging: Lunar & planetary
  • User level: Beginner
  • Optical design: Reflector
  • Optical diameter: 114mm
  • Focal length: 900mm
  • Focal ratio: f/7.9
  • Optics type: Spherical
  • Glass material: Low thermal expansion borosilicate glass
  • Eyepieces: Sirius Plossl 25.0mm, 10.0mm (1.25")
  • Magnification with included eyepieces: 36x, 91x
  • Resolving power: 1.02arc*sec
  • Lowest useful magnification: 17x
  • Highest useful magnification: 228x
  • Highest theoretical magnification: 228x
  • Limiting stellar magnitude: 12.9
  • Optical quality: Diffraction limited
  • Finder scope: 6x26 Correct-image
  • Focuser: 1.25" Rack-and-pinion
  • Secondary mirror obstruction: 28mm
  • Secondary mirror obstruction by diameter: 24%
  • Secondary mirror obstruction by area: 6%
  • Mirror coatings/over-coatings: Aluminum & Silicon Dioxide
  • Mount type: Dobsonian
  • Astro-imaging capability: Simple moon shots
  • Computerized compatibility: Not compatible
  • Bearing material: PTFE and UHMW bearings
  • Tube material: Steel
  • Tripod material: Wood
  • Length of optical tube: 35.0 in.
  • Weight, fully assembled: 17.6 lbs.
  • Additional included accessories: Collimation cap, Eyepiece rack
  • Other features: CorrecTension system, Navigation knob, Integral carry handle
  • Warranty: One year


  • Orion SkyQuest XT4.5 Dobsonian reflector telescope optical tube assembly
  • 25mm Orion Sirius Plossl telescope eyepiece, 1.25"
  • 10mm Orion Sirius Plossl telescope eyepiece, 1.25"
  • Orion 6x26 correct-image finder scope
  • Finder scope bracket with O-ring
  • Collimation cap
  • Telescope eyepiece rack
  • Dust cap
  • Left panel
  • Right panel
  • Front brace
  • Top base plate
  • Ground base plate
  • Base assembly screws
  • Trip caps (black)
  • Plastic telescope feet
  • Feet attachment wood screws (length 3/4")
  • Self-adhesive rubber bumper
  • Large hex-head bolt (length 2")
  • 3/8" washers
  • 3/8" lock nut
  • Nylon spacer (white)
  • T-nut
  • Spring coils
  • Pull loops
  • Nylon spacers
  • 1/4" washers
  • Phillips-head screws
  • Starry Night Special Edition astronomy software download insert
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